--- zzzz-none-000/linux-5.4.213/include/net/addrconf.h	2022-09-15 10:04:56.000000000 +0000
+++ alder-5690pro-762/linux-5.4.213/include/net/addrconf.h	2024-08-14 09:02:08.000000000 +0000
@@ -494,6 +494,8 @@
 		(addr->s6_addr32[3] ^ htonl(0x0000006a))) == 0;
 #endif
 }
+struct net_device *ipv6_dev_find(struct net *net, struct in6_addr *addr,
+				 int strict);
 
 #ifdef CONFIG_PROC_FS
 int if6_proc_init(void);